"Some things the experiment stations have found out about nitrogen, nitrogen fixation, and legumes."; "Dustman, Robert B. (Robert Barclay), 1892-"; "Nitrogen.", "Legumes.", "Nitrogen--Fixation."; "Dustman, Robert B. (Robert Barclay), 1892-"; "1917"; "

Serial issue. Issued as: West Virginia University. College of Agriculture. Extension Department. Agricultural summary, no. 2 (1917:June).

"; ""; "P19002"; "pec"; "Nitrogen--Fixation.", "Nitrogen.", "Legumes."; "14256"; .